diff --git a/tests/Provider/Node/SystemNodeProviderTest.php b/tests/Provider/Node/SystemNodeProviderTest.php
index fa9e98e..a425d83 100644
--- a/tests/Provider/Node/SystemNodeProviderTest.php
+++ b/tests/Provider/Node/SystemNodeProviderTest.php
@@ -15,9 +15,13 @@ class SystemNodeProviderTest extends TestCase
     public function testGetNodeReturnsSystemNodeFromMacAddress()
     {
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
 
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $provider->expects($this->once())
             ->method('getIfconfig')
             ->willReturn(PHP_EOL . 'AA-BB-CC-DD-EE-FF' . PHP_EOL);
@@ -50,11 +54,15 @@ class SystemNodeProviderTest extends TestCase
     {
         //Using a stub to provide data for the protected method that gets the node
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
         $provider->method('getIfconfig')
             ->willReturn(PHP_EOL . $formatted . PHP_EOL);
 
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $node = $provider->getNode();
         $this->assertEquals($expected, $node);
     }
@@ -67,13 +75,17 @@ class SystemNodeProviderTest extends TestCase
     {
         //Using a stub to provide data for the protected method that gets the node
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
         $provider->method('getIfconfig')
             ->willReturn(PHP_EOL . 'AA-BB-CC-DD-EE-FF' . PHP_EOL .
                 '00-11-22-33-44-55' . PHP_EOL .
                 'FF-11-EE-22-DD-33' . PHP_EOL);
 
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $node = $provider->getNode();
         $this->assertEquals('AABBCCDDEEFF', $node);
     }
@@ -85,13 +97,17 @@ class SystemNodeProviderTest extends TestCase
     public function testGetNodeReturnsFalseWhenNodeIsNotFound()
     {
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
 
         $provider->expects($this->once())
             ->method('getIfconfig')
             ->willReturn('some string that does not match the mac address');
 
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $node = $provider->getNode();
         $this->assertFalse($node);
     }
@@ -103,13 +119,17 @@ class SystemNodeProviderTest extends TestCase
     public function testGetNodeWillNotExecuteSystemCallIfFailedFirstTime()
     {
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
 
         $provider->expects($this->once())
             ->method('getIfconfig')
             ->willReturn('some string that does not match the mac address');
 
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $provider->getNode();
         $provider->getNode();
     }
@@ -137,7 +157,14 @@ class SystemNodeProviderTest extends TestCase
         AspectMock::func('Ramsey\Uuid\Provider\Node', 'php_uname', $os);
         $passthru = AspectMock::func('Ramsey\Uuid\Provider\Node', 'passthru', 'whatever');
 
-        $provider = new SystemNodeProvider();
+        $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
+            ->setMethods(['getsysfs'])
+            ->getMock();
+
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
+
         $provider->getNode();
         $passthru->verifyInvokedOnce([$command]);
     }
@@ -168,11 +195,14 @@ class SystemNodeProviderTest extends TestCase
     {
         //Using a mock to verify the provider only gets the node from ifconfig one time
         $provider = $this->getMockBuilder('Ramsey\Uuid\Provider\Node\SystemNodeProvider')
-            ->setMethods(['getIfconfig'])
+            ->setMethods(['getIfconfig','getsysfs'])
             ->getMock();
         $provider->expects($this->once())
             ->method('getIfconfig')
             ->willReturn(PHP_EOL . 'AA-BB-CC-DD-EE-FF' . PHP_EOL);
+        $provider->expects($this->once())
+            ->method('getsysfs')
+            ->willReturn(false);
         $provider->getNode();
         $provider->getNode();
     }